| Spindle motor and stator structure thereof -> Monitor Keywords |
|
|
  Spindle motor and stator structure thereofUSPTO Application #: 20060186744Title: Spindle motor and stator structure thereof Abstract: A spindle motor includes a stator structure and a rotor structure coupled to the stator structure. The stator structure has a stator base, a magnetic conductive structure surrounding the stator base, and a first buffer structure provided in the gap defined by the stator base and the magnetic conductive structure and in contact with both the stator base and the magnetic conductive structure. Furthermore, a second buffer structure and a third buffer structure are respectively provided between the stator base and the casing and between the stator base and the base plate. (end of abstract) Agent: Birch Stewart Kolasch & Birch - Falls Church, VA, US Inventors: Chin-Chu Hsu, Chia-Ching Weng, Tsung-Ju Yang USPTO Applicaton #: 20060186744 - Class: 31006700R (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20060186744. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] (a) Cross Reference to Related Application [0002] The invention is a continuous in part of the application filed on Dec. 09, 2004, with an application Ser. No. 11/007,191 and entitled "SPINDLE MOTOR AND STATOR STRUCTURE THEREOF". [0003] (b) Field of the Invention [0004] The present invention relates to a spindle motor and stator structure thereof and, more particularly, to a spindle motor and stator structure thereof having reduced vibrations and noises during operation. [0005] (c) Description of the Related Art [0006] Referring to FIG. 1, a conventional spindle motor 100 includes a rotor 102 and a stator 104 riveted on a base 110. The stator 104 consists of silicon steel sheets 106 and a stator base 108, which are riveted together. [0007] However, when the spindle motor 100 runs, the silicon steel sheets 106 is liable to vibrate due to the attraction of the rotor 102. In that case, since no damping mechanism is incorporated in the stator structure 104 of the conventional spindle motor 100, such vibrations are transmitted to the base 110 through the stator base 108. Further, because the silicon steel sheets 106, the stator base 108, and the base 110 are riveted together, there must be gaps existing among them. Under the circumstance, the gaps can further enhance the vibrations of the silicon steel sheets 106, the stator base 108, and the base 110, and thus the noises made by the spindle motor 100 are considerably increased as a result. BRIEF SUMMARY OF THE INVENTION [0008] In view of this, an object of the invention is to provide a spindle motor having reduced vibrations and noises during operation. [0009] According to the invention, a spindle motor includes a stator structure and a rotor structure coupled to the stator structure. The stator structure has a stator base, a magnetic conductive structure surrounding the stator base, and a buffer structure provided in the gap defined by the stator base and the magnetic conductive structure and in contact with both the stator base and the magnetic conductive structure. [0010] The spindle motor further comprises an additional buffer structure respectively provided between the stator base and a base plate connected to the stator base. In additional, a holding member can alternatively be set on a side of the stator base of the spindle motor to support and fix the additional buffer structures. [0011] Through the design of the invention, since the stator base and the magnetic conductive structure are connected by the buffer structure, which can absorb the vibrations resulting from the rotation of the rotor structure and prevent it from being transmitted to the stator base, the casing and the base plate, the vibrations and noises are considerably reduced as the spindle motor runs. BRIEF DESCRIPTION OF THE DRAWINGS [0012] FIG. 1 is a schematic diagram illustrating a conventional spindle motor. [0013] FIG. 2 is a schematic diagram illustrating a spindle motor according to an embodiment of the invention. [0014] FIG. 3 is a schematic diagram illustrating a spindle motor according to another embodiment of the invention. [0015] FIG. 4 is a schematic diagram illustrating a spindle motor according to another embodiment of the invention. [0016] FIG. 5 is a schematic diagram illustrating a spindle motor according to further another embodiment of the invention. [0017] FIG. 6 is a schematic diagram illustrating a spindle motor according to still another embodiment of the invention. [0018] FIG. 7 is a schematic diagram illustrating a spindle motor according to yet another embodiment of the invention. DETAILED DESCRIPTION OF THE INVENTION [0019] FIG. 2 illustrates a spindle motor 200 including a rotor structure 202 and a stator structure 214. The stator structure 214 includes a magnetic conductive structure 206 and stator base 208, and a gap 216 is defined therebetween by both of them. A buffer structure is provided in the gap 216 between the magnetic conductive structure 206 and the stator base 208. [0020] The rotor structure 202, which includes a casing 220 and a magnetic structure 218 affixed to the underside of the casing 220, encloses the stator structure 214. The magnetic interaction induced between the stator structure 214 and the magnetic structure 218 of the rotor structure 202 causes the rotations of the rotor structure 202 and other structures linked to it, such as a blade, mounting plate and a disk. Inside the casing 220, a shaft (not shown) is located at its center and deeply inserted in the stator base 208 to allow the rotor structure 202 to rotate about it. The magnetic structure 218 can be a magnetic tape having more than two magnetic poles, with two adjacent poles being in opposite polarity. The casing 220 can be made of metal, plastic, or magnetic conductive materials. Continue reading... Full patent description for Spindle motor and stator structure thereof Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Spindle motor and stator structure thereof patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Spindle motor and stator structure thereof or other areas of interest. ### Previous Patent Application: Electrical power tool Next Patent Application: Cooling plate for alternator rectifier Industry Class: Electrical generator or motor structure ### FreshPatents.com Support Thank you for viewing the Spindle motor and stator structure thereof patent info. IP-related news and info Results in 1.24116 seconds Other interesting Feshpatents.com categories: Electronics: Semiconductor , Audio , Illumination , Connectors , Crypto , |
||
